Pasteurizing apparatus.



PATENTED APR. 28, 1908. J. T. H. PAUL. PASTEURIZING APPARATUS.

APPLICATION FILED JULY 25 1907.

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LIQZUZZZOQ/Z/Z N 886 01s. PATE TED APR. 28 1908.

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PASTEURIZING APPARATUS.

APPLIGATION FILED JULY25, 1907. I 10 SHEETS SHEET No. 886,013. PATENTEDAPR. 28, 1908.

J. T. H. PAUL. PASTEURIZING APPARATUS.

A P I I F D 1 I P L OAT 0N ILE JULHS' .907 10 sums-sum 3.

- ilk/2%?) No. 886,013. PATENTED APR. 28, 1908. J. T. H. PAUL. I

PASTBURIZING APPARATUS.

, APPLICATION FILED JULY 25, 1907.

. 10 SHEETS-SHEET 4.

No. 886,018. PATENTED APR. 28, 1908.

J. T. H. PAUL. PASTEURIZING APPARATUS. APPLICATION FILED JULY25 1907 A wm m5 m M m R M 'No. 886,013. PATENTED APR. 28, 1908. J. T. H. PAUL.

PASTEURIZING APPARATUS.

APPLICATION FILED JULY 25, 1907.

10 SHEETS-SHEET 6.

No. 886,013. PATENTED APR. 28, 1908. .T. T. H. PAUL. PASTEURIZINGAPPARATUS. APPLICATION FILED JULY 25, 1907.

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: I. v Q. 1 M 52 No. 886,013. PATENTED APR. 28, 1908.

J. T. H. PAUL. v PASTEURIZING APPARATUS.

APPLI 3ATION FILED JULY25, 1907. lo SHEETS SHEET 8 22 3; if 33 v y y.

, No. 886,013. PATENTED APR. 28, 1908.

J. T. H. PAUL.

PASTEURIZING APPARATUS. APPLICATION FILED .TULY25, 1907.

10 SHEETS-SHEET 9.

No. 886,013. PATENTED APR. 28, 1908. V A J. T. H. PAUL.

PASTEURIZING APPARATUS,

APPLICATION FILED JULY 25, 1907.

' 10 SHEETSSHEBT 10.

UNITED STATES PATENT OFFICE.

JOHN-T. H. PAUL, OF CHICAGO, ILLINOIS, ASSIGNOR TO E. GOLDMAN & CO.INC., OF CHICAGO,

ILLINOIS, A CORPORATION OF ILLINOIS.

PASTEURIZING APPARATUS. v

To all whom it may concern:

Be it known that I, JOHN T. H. PAUL, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented new and useful Improvements in Pasteurizing Apparatus, of whichthe following is a specification.

This invention relates to improvements in pasteurizing apparatus of theclass in which the pasteurizing liquid contained in a series ofintercommunicating tanks or compartments is preliminarily heated to thesterilizing temperature in. a number of consecutive members of theseries, to be thereafter con tinuously circulated throughout the seriesfor subjecting the material to be treated, successively introduced intosuch members, to diflerent stages of temperature of the pasteurizingliquid; thereby rendering the operation of the-ap aratus continuous, inthe sense that all 0 the members of the series may, during theoperation, be in simultaneous use.

Referring to the accompanying'drawings Figure 1 shows the improvedapparatus by a diagrammatic view. Fig.- 2 is an endelevation of theapparatus surmounted by a traveling gauntree Fig. 3, a plan view, andFig. 4, a broken side view of the apparatus. Fig. 5 is a longitudinalvertical section through one of the two tanks employed, taken at theline A on Fig. 3. Fig. 6 isa broken longitudinal section showing theconstruction of the steam-jet ump employed for heating the liquid; andFig. 7 is a similar view showing theconstruction of the steam-jet umpemployed for circulating the liquid throughout the series ofcompartments. Figs. 8 and 9 are sections taken at right angles to eachother, res ectively, at the lines B and C on Fig. 10, s owing theconstruction of valve employed for controlling the flow to and from eachcompartment under the action of the heating pump; and Fig. 10 is a sec--tional view of the same valve at line D on Fig.9. Figs. 11 and 13 aresections of the same valve taken at the line E on Fig. 8

through its upper part and showing the ports in open and closedpositions respectively; and Figs. 12 and 14 are similar sections throughthe lower part of t l e valve at line F on Fig. 8, showingthe'portsin-open and closed position, respectively. Fig. 15 is-a broken sectionalview of the diaphragm-device employed in the system shown connect-Specification of Letters Patent. Application filed July 25, 1907. SerialNo. 385,460.

Patented April 28, 1908.

sectional and diagrammatic. in its nature, of

the spring-seated valve-device and thermostat, also employed in thesystem.

The apparatus, while intended for use in pasteurizing sauces, catsup,canned or bottled goods of al kinds, requiring to be sterilized toafford to them the necessary keeping .quality, rather than treated withpreservative chemicals, has been more particularly devised forsterilizing beer in bottles, to the treatment of which, therefore, ghedescription hereinafter contained is conned.

Two similar tanks 15 and 16, of desired capacity, are placedside-by-side, though so far as the purview of the invention is concerneda single tank may be used Where its length would not cause it to take uptoo much room. Partitions 17 extending between the walls of each tankfrom their u per ends and short of the tank-bottom, and a terposehereinafter explained. Each tan: is

shown to be sub-divided into seven compartments, making fourteen in all,but that number may be decreased or increased according toparticularrequirements for which the apparatus may be constructed.

A cold-water su ply-pipe 19 extends along the outer side am. one end ofeach tank at the base thereof and communicates with the interior of thetanks through branches containing valves 20, which may be of thestraight-way variety, seven such branches being shown to be provided foreach tank according to the representation in the diagrammatic view. Twosimilar pipes 21 and 22 extend endlessly about both tanks above theircenters, along their sides and across their ends, being sufficientlyclose together along the tank-sides to ermit a single valvedevice 23,hereinafter escribed, to be interposed in both. The valve-devicereferred to is shown in detail in Figs. 8 to 14, inclureserves, and vsive, and involves the following-described construction: Thevalve-casing is formed with an outer wall 24 containing ports 25, 26 and27 in its upper portion, and an inner wall 28 containinga port 29registering with the port 25, a port 30 registering with the port 26,and a port 31 registering with the ort 27, these walls forming betweenthem a g-pass chamber 32 extending part-way a out the interior of thecasing. The lower section of the casing is formed with a continuation ofthe outer wall 24 containing opposite orts 33 and 34, and with acontinuation of t 1e inner wall 28 containing the opposite ports 35 and36, these lower sections 7 of the walls forming between them-a by-pass Vassage 37, extending like the assage 32, but divided therefrom by ahorizontal partition 38 (Figs. 8 and 9). The valve-plug 39 is divided bya partition 40 into an upper section to fit rotatably in thecorresponding sections of the casing and containing the three ports 41,42 and 43, and a lower section to fit similarly within the correspondingsection of the casing and containing the lateral ports 44 and 45 and theend-port 46 at the open lower end of the lower casing-section.

Coincident with each compartment in a tank, a valve-device 23 isinterposed in the two pipes 21 and 22 by coupling into the pipe 21 atthe ports 25 and 27 and by coup-- g into the ipe 22 at the ports 33 and34, each valveevice being secured at the flanged side of its casing to aside-wall of a tank wherein a port 47 is provided (Figs. 11 and 13), toregister with the port 26. A branch-pipe 48 is coupled at its u per endwith each valve-casing at the on port 46 therein and extends. downward,being coupled at its lower end at a port in the tankside near its bottomfor conducting hot wa-v ter, rovided as hereinafter described, into thebottom of the tank.

A supply-pipe 49 for live steam extends across one end of the two tanks(Fig. 2) and is connected at the outer side of the tank 16 with the pipe22, near which it is provided at 50 with a shut-off valve forcontrolling the admission of steam into that pi e for a purposehereinafter explained; an the steamipe is provided a jacent to the outerside of the tank 15 with a branch 51 containing a shut-off valve at 52and leading to a steamjet pump 53, the detailed construction of which isshown in Fig. 6 to involve that described as follows: Into one end of aT- coupling 54, forming a casing, is screwed a nozzle 55 having lateralinlet-ports 56. Another, smaller, nozzle 57 is screwed into the outerend of the nozzle 55 to extend concentrically therewith and has at itsouter end a right-angled connection with the steam-pipe branch 51, thislast-named nozzle being closed at its outer end to afford a bearing forthe reciprocating stem 58 of a valve.59 for controlling the flow ofsteam throu h the nozzle 57. This valve contains latera l ports 60leading into a chamber 61 in the valve, which also contains adischarge-passage 62 leading from the inner end of the chamber to theextremity of the valve, so that a slight flow of steam may be maintainedthrough the valve 59, when it is closed, from the branch 51. "Within the.casing 54 a third nozzle 63, larger than the nozzle 55, is screwed uponthe latter to extend concentrically therewith, being provided withlateral water-inlet ports 64, like the ports 56, and centered for itssupport in a pipe 65 coupled to one end of the T-coupling 54 and leadingto a three-way valve 66, of ordinary construction, provided in the ipe22. This construction of ump affords t 1e two mixing chambers 67 an( 68for steam and water discharging into the pipe 65.

The casing 53 is connected by a pipe-section 70 with a Tcoupling 71containing a thermostat-device, which is preferably sub stantially thesame as that fully shown and described in an analogous situation and forthe same purpose in my pending application, Serial Number 379,530, filedJune 17, 1907. This thermostat-device is shown in detail in Fig. 16: Ina reducer 184 screwed into one end of the T-coupling or casing 71 isscrewed the thermostat proper, consisting of a tube 185 closed at oneend by a plug 186 and adapted to contain a fluid, such as ether, thatwill expand and contract under variations in temperature, this tubeterminating at its opposite end. in a tube 187 containing a reduced bore188 and ending in a diskshaped head 189 upon which is secured by aring-nut 190 screwed upon the disk, a diaphragm 191, to the center ofwhich the bore 188 o ens. This end of the thermostat enters t e casingof the spring-seated valvedevice 77 in which is fulerumed on the ring190 an angular lever 193 bearing at one end against the center of thediaphragm and having a threaded vertical opening in its opposite end toreceive a screw 194 passing throughan opening 195 in the casing, beyondwhich it carries a dial-finger 196 within the casing 197 of a suitabledial.

To the casing 71 is coupled one end of a pipe 72 containing athermometer 73 and having its 0 posite end connected with a three-way vave 74 interposed in the pipe 21 and of the same construction as thevalve 66.

A diaphragm-device 75, of the same con.- struction and serving the samepurpose as the corresponding device in the aforesaid application, isconnected with the outer end of the valve-stcm 58, and is shown indetail in Fig. 15 to consist of a casing 178 supported on arms 179 andhaving its base formed of a flexible diaphra m 180 sup )orted by springs181 and'central y to which is fastened the ssaeia stem 58 of thesteam-jet pump, whereby reducing the air-pressure against the upper sideof the diaphragm raises the valve 59. An air-pressure pipe 76 leads tothe diaphragmdevice from an incased spring-seated valvedevice, indicatedat 7 7, for'controlling, under the action of the thermostat-device, thesupply of lair-pressure through a pipe 69 (Fig. 4) to thediaphragm-device; this spring-seated valve being regulable from anindicator connected with a lever fulcrumed to engage with anotherdiaphragm-device in the casing, into which last-named device thethermostaticfiuid expands. The incas'ed s ring-seated valve-device thusreferred to is s own in detail in its connection with thethermostatdevice in Fig. 16, and it involves the following-describedconstruction: Within the casing 77 the air-supply pipe 69 andair-conducting pipe 76 leading to the diaphragm device are coupledtogether by a head 198 having a bracket-extension 199, at which it isscrewed to an inner wall of the casing. This head contains avalve-chamber 200 housing a ball-valve 201 supported on a spring 202 inthe passage leading from the end of the pipe 69 in the head, and alunger-rod 203, passing through a relative y wide bore 204 in a plug 205screwed into the upper end of the head, bears at one end against theball-valve and coincides at its opposite end with the screw 194. Bymeans of the thermostat-device, when water passing through the pipe 70attains a certain predetermined temperature, the heat, by expanding thefluid in the tube 185, causes it to raise the diaphragm 191, therebyactuating the lever 93 to depress the screw 194 against the plunger 203.

and open the valve 201. Thus 0 enlng the valve admits air-pressure fromthe pipe 69 to the pipe 76 through which it acts against the diaphragm180 to depress the rod 58 and seat the valve 59, thereby shutting offthe steam-supply for heating the water until the water in the pipe 70 isproperly lowered in temperature to contract the thermostat-fluid andpermit conse uent lowering of the diaphragm 191 to be iollowed by thecontacting end of the lever 193 under the recoil-action of the spring202 to raise the ball-Valve against its seat and shut off the air-supplyto the pipe 76. Thereupon the air under pressure against the diaihragm180 escapes by way of the pipe 76 through the opening 204 about theplunger 203 working in the plug 205, and discharges through avent-opening 206 in the casing 77, with the result that the springs 181are freed to restore the diaphragm 1.80 to its normal position ofopening the valve 59 for resuming the flow of steam. By screwing theadjusting-screw 194 into the lever 193 to raise the adjacent endthereof, the opposite end .of the lever is pressed against the diaphragm191 to adapt it to turn the lever under a lesser force of expansiori-ofthe thermostat-fluid'and thus to shut off the steam-supply at a lowertemperature of the water in t e pipe 70; andby turning the screw in theopposite direction, a higher temperature of the thermostat-fluid will berequired to effect opening of the valve 201. The dial-device 197 may beset for shutting off the steam at any desired temperature by removingthe cover with which it is shown to be provided (and which should betransparent) to permit access to the finger 196 for turning its work thescrew 194 and for setting the finger with relation to a suitable gage(not shown) marked on the dial over which the finger moves to indicatethe predetermined pressure for the run of the apparatus. A water-pipe 78connects the two tanks at one end near their bases; and the tanks areprovided below their to s, on opposite ends, respectively, with overowpipes 79 and 80, leading preferably to a sewer. 1

For circulating the water in the tanks through them, a pump'is providedpreferably in the form of a steam-jet pump-81, shown in detail in Fig.7, and involving the followingdescribed construction: A T-shaped casin82 has its horizontal branch'connected wit a pipe 83 leading out of thetank 15 near its top elow the overflow-level, at the end opposite thatat which the heatin -pump 53 is provided. Into one end of t 's casingisscrewed a tapering nozzle 84 containing lateral ports 85 and havingscrewedupon it within the casing a nozzle 86 containing lateral ports87. A third nozzle 88 containing lateral orts 89 isscrewed'within'thecasing upon t e nozzle 86 and is supported, to

centralize it with the nozzles behind it, in a tube 90 screwed into theop osite-end of the casing. Still another nozze 91 is screwed into theouterend of the nozzle 84 to-centralize it therewith and has screwedinto its outer-end a tapering bearing 92 for a needlevalve 93 having itsstem 94, which works through a stufling-box 95, pivotally connected atits outer end with a lever 96' fulcrumed-at one end on a frame 97,presenting water which enters the casing through the pipe 83. The pi e90 communicates with the end of the tan 16 at a point corresponding tothe connection of the pipe 83 with-the tank 15; and this pi e 90 issurrounded by a water-'acket 103, p ugged at its op osite ends a out'thepipe, and through whic cold pose pipe 105.

The operation is as follows, particular reference bein had forelucidating the explanation to the dia rammatic representation in.Fig.1: All t e compartments are filled, to the heights of the overflows fromthe tanks, with cold water through the pipe 19 and its branches byopening the valves 20 in the latter. When so filled, the contents of adesired number of the compartments are heated to the requiredpasteurizing temperature by opening the valves23 on those com artmentsto the positions represented in Figs. 11 and 12, and starting the actionof the jet-pump 53 by admitting steami into it on o ening the valve 52.It may be supthat the contents of the compartments numbered from 1 to 5,inclusive, in the tank 15 are to be thus initially heated, though thenumber'will vary according to the length of time during which it isdesired to maintain the beer to be pasteurized under subjection to theasteurizing temperature, as will be more fu ly explained hereinafter.The action of the steam-jet in the heating pump 53 sucks the water fromthe upper portlons of the five compartments throu h the ports 47 intothe upper sections of the valve-plugs of the respective valves 23,whence it discharges into the ipe 21, wherein the three-way valve 74 asbeen o ened to permit the flow, as has also the 't ree-way valve 66 inthe ipe 22. The valve 74 is so opened as to direct the flow from thepipe 21 through the ipe 72, past the thermostat-device 71 into t eheater-53, whence it passes through the pipe 65 into the pipe 22 withthe valve 66 therein so turned as to continue the flow in the ipe 22 inthe opposite direction to that in t e pipe 21, the suction being in theopposite direction to the discharge. In passing through the pump 53, thewater and steam become throughly mixed in the mixing-chambers 67 and 68in a manner to prevent Stratification of the heat and produce uniformdistribution thereof throughout the water, which enters the samecompartments at their bases through the pipes 48 and lower sections ofthe res ective valves 23. This heating circulation is maintained fromand to the respective tanks through the endless pipes 21 and 22, andthrough the by-pass chambers 32 and 37 of the closed valves 23 in saidpipes, until the contents of the five tanks are heated to thepasteurizing temperature. Thereafter this hot water is circulatedthroughout the series of compartments to supplant the cold water in eacwith the hot water from the initiall heated tanks. This is done by anysuitab 6 pump, but preferably the steamjet pump shown in Fig. 7, on oening its valve 93 to admit the passage of ive steam seams through thepump for producing its opera tion in sucking the water throu' h the pipe83 from the narrow space in the a jacent end of the tank 15 produced bythe respective endpartition therein, and discharging it into thecorresponding space formed by the endpartition in the adjacent end ofthe tank 16 through the pipe 90. In this way a constant flow of thewater in both tanks is maintained and the provision of the narrow spacesaflorded by the end-partitions in the tanks assures circulation throughthe end-compartments, the contents of which would otherwise notdischarge, but would tend to remain dormant. The partitions forming thecompartments, by their alternating arrangement afford a serpentinecourse through the tanks for the water, to cause its circulation. Thedescribed construction of the pump 81 renders it adequately powerful forits circu-- latin work on the large body of water to be circulated, theplurality and arrangement of nozzles in the pump adapting it tocirculate the water with the minimum consumption of steam. When thelever 96 is once set to set the valve 93 for a given apparatus and for agiven period of time for completing the circulation, it need notthereafter be disturbed unless the discharge-openin in the nozzle 91should become clogged, w en, by working the lever back and forth, thevalve will dis lodge the material which causes the choking. It is notdesired, though it can not be avoided because of the necessary use ofsteam for operating the pump 81, to heat the water umped by it; and tocounteract the sli ht eating eifect of the steam, the water-jac et 103is rovided.

Wit the contents of the first five compartments heated, as described, aauntree 106, of, any suitable construction, s own of double form toextend across both tanks and travel on tracks 107 provided to extendalong the to s of their outer sides, is brought into use. e gauntree isdesigned to elevate into it bottle-racks 108,- which may be stored inthe tank-compartments, one in each, and to lower a rack into acompartment, loaded with. beer to be asteurized in bottles 109 containedin baskets 110 fitting the racks.

The gauntree is first moved, with the particular arran ement ofcompartments shown and describe( over the compartment 8, into which arack of the bottles is lowered. This is done before the circulating pump81 is' of a out seven and one-half minutes,

30 sion to the compartment 9 is filled with cold beer, by the use of thegauntree, the valve 23 of compartment 1 is closed and that ofcompartment 6 is'gfopened to circulate its contents from that .5 comartment through the heating pump .53 I

10 transfer the contents of the compartment 6 into compartment 7, thatin compartment 7 into compartment 8, and so on, thereby subjecting t ebottles in the latter to a higher tem erature. This consumes anothereriod urin which compartment 10 is filled with col beer, when the valve23 of compartment 2 is closed and that of compartment 7 is opened. Thecontents of the compartment 7 are thus 1 circulated and heated by thepump 53. This procedure of closing a valve 23 of one compartment andopening that of another compartment is continued with the effect ofgradually raising the temperature of the wa- 25 ter'in each compartmentin succession, supplying heat by the action of the ump 53 to compensatefor the loss throug radiation and mtroducing the cold bottles, forheating the contents of each compartment in succespasteurizingtemperature, at which it is maintained for a period of about thirtyminutes, until all of the compartments have been filled with bottles;after which, in the continuation of the working of the apparatus, a rackof bottles containing pasteurized beer will be taken b the gauntree outof one compartment (name y that numbered 8), which will thereu on beimmediately refilled with a rack of co (1 bottles to be pasteurized 40by gradually raising the temperature of the water in that compartment inthe manner already described. Thereafter the procedure is repeated ofclosing a valve 23 m one compartment and opening the similar valve ecompartment threeremoved therefrom, and during the period of seven andonehalf minutes consumed in completely changing the water from each comartment into another, taking out a rack of t e bottles that has beenfinished, as to pasteurizing, and introducing into that compartmentanother rack of cold bottles.

The three-way valves 66 and 74 serve a peculiar pur ose which is ofimportance because of the ack of uniformity of the flow of water throughthe heating pump out of the compartments. That is to say, in initiallyheating the first five compartments, with the three-way valves turned tothe position de- 69 scribed, the greater flow and return of water willbe from and to the compartment 5, with less from the compartment 4,still less from the compartment 3, and so on to the first compartment,whereby when'the temperature in the compartment 5 shall have reached 140F. or the pasteurizing temperature, that in each preceding compartmentwill be lower, say to the extent of 5, than the temperature in the nextadjacent compartment in advance of it; whereas it is necessary that thesame temperature (140 F.) shall be provided throughout all of the fivecompartments. When, therefore, the maximum temperature has been attainedin the tank number 5, the three-way valves are turned to the oppositeosition, or that of changing the direction of iiow to andfrom theheater, whereby the greater proportion of flow is from and to thecompartment 1, decreasing gradually to comartment 5. In this Wayprovision is made or equalizing the temperature in the five tanks. Whenthe temperature in the five tanks has been thus equalized, the three-wayvalves are turned back to the original osition. Moreover, by providingthese t1reeway valves they enable the water being heated to pass througheach in opposite directions in pi es 21 and 22, which is sometimesdesirab e.

'When it is desired to expedite heating the contents of the first fivecompartments, this may be accomplished by opening the valve 50 tointroduce live steam into the water discharging from the heater 53through the pipe 22, to supplement the action of the eater.

In an apparatus employing the fourteen compartments shown and described,it requires about one hour and forty-five minutes, after heating up thecontents of the first five tanks, to complete the circuit ofpasteurization in each com artment. Thus,the beer will be subjecteperature in each compartment for a period of about thirty seven andone-half minutes, during twelve and one-half of which the pasteurizingheat will have penetrated and be maintained in the center of the beer inthe bottles. Where it is desired, or the material treated requires thatit be subjected to the pasteurizing temperature during a eriod of onlyfive minutes, or thereabout, t e initial heating may be confined to.four tanks, since it requires only four times seven and one-halfminutes, or thirty minutes, for the heated contents of the fourcompartments to pass the compartment filled with beer to be pasteurizedas against five times seven and one-half, or thirt seven and one-halfminutes so to pass t e heated contents of five compartments. For thesame reason, where the material to be pasteurized requires subjection t0the pasteurizing temperature during a period of, say, twenty minutes,the contents of six compartments require to be 1mtiall heated since itwill take the contents of t ese compartments six times seven andone-half minutes, or forty-five minutes to pass the compartment in whichpasteuriza tion is taking place, thereby-affording twentyto thepasteurizing temfive minutes for heating up the bottles and twentyminutes for maintaining that heat in the center of the beer.

As will be understood, the two tanks 15 and 16 are, ractically, one, thetwo shown being provic ed as a mere matter of preference, forconvenience in erection and installation. It will also be understoodthat while fourteen compartments are herein shown and described, thenumber may vary according to the capacity required and purose of theapparatus 3 and that the initial eating of the water to the pasteurizingtemperature may be confined to any desired number of the compartments,according to the capacity of the tank and the time required forcompleting the circuit of the water therethrough.

What I claim as new, and desire to secure by Letters Patent, is

1. In a pasteurizing apparatus, the combination with a series ofcompartments for the pasteurizing liquid, forming a sinuous course forsaid liquid, an. outlet and inlet pipe for each compartment in circuittherewith, a heating pump in said circuit and a circulating pumpcommunicating at its suction and disc arge sides, respectively, with theend compartments.

2. In a asteurizing apparatus, the combination wit a series ofcompartments for the pasteurizing liquid, forming a sinuous course forsaid liquid, an outlet and inlet pipe for each compartment in circuittherewith, a heating pump controllably communicating with all of saidcircuits, valves for controlling said communication, and a circulatingpump communicating at its suction and discharge sides, respectively,with the end compartments. 1

3. In a pasteurizing apparatus, the combination with a tank for thepasteurizing liquid containing alternating .partitions, formingcompartments andv a sinuous course through them for said liquid, anoutlet and inlet pipe for each compartment in circuit therewith, aheating pump in said circuit and a circulating pump communicating at itssuction and disc arge sides, respectively, with the end compartments.

4. In a pasteurizing ap aratus, the combination with a tank for t epasteurizing liquid, of alternating partitions in said tank formingcompartments therein and a sinuous course through them forthe liquid,the end partitions forming with the tank-walls relatively narrow spaces,an outlet and an inlet pi )e for each compartment in circuit therewith,a heating pump for the liquid communicating with each circuit, a valvefor controlling the communication, and a circulating Bump communicatingat its suction and disc arge ends, respectively, with said relativelynarrow spaces in the tank ends.

5. In a pasteurizing apparatus, the combination with a series ofcompartments for the pasteurizing liquid forming a sinuous course forthe liquid, of a pair of pipes extending about said compartments, aheating pump communicating with said pipes, valve devices, one for eachcompartment, connected with both said pipes, outlet and inlet pipes foreach compartment in circuit therewith and communicating through saidvalve device, and a circulating pump communicating at its suction anddischarge sides, with the end compartments.

6. In a pasteurizmg apparatus, the combination with a series ofcompartments for the pasteurizing liquid forming a sinuous course forthe liquid, of a pair of pi es extending about said compartments, aeating pump communicating with said pipes, valve devices, a three-wayvalve in each of said pipes, and a circulating pump communicatmg at itssuction and discharge sides, respectively, with the end compartments.

7. In a pasteurizing a parat'us, the combination with a series 0compartments for the pasteurizing liquid forming a sinuous course forsaid liquid, outlet and inlet pipes for each compartment in circuittherewith, a valve for each circuit, a steam-jet heating pump for theliquid eontrollably communieating with each compartment through itsvalve, a valved steam-supply pipe leading to said pump, and acirculating pump communicating at its suction and discharge sides,respectively, with the end compartments.

8. In a pasteurizing apparatus, the combination with a series of comvartments for the pasteurizing liquid, a pair oi pipes extending aboutsaid compartments, a steam-jet pipe communicating with said pipes, asteam' supply pipe leading to said pump, valve devices, one for eachcompartment connected with both said pipes, outlet and inlet pipes foreach compartment connected to said valve-devices and in circuit withsaid compartments, whereby the communication between the pump and eachcompartment is controlled, and a circulatin pump communicating at itssuction and 'scharge sides, with the end compartments.

9. In a pasteurizing' a paratus, the combination witha series 0 comartments for the pasteurizing liquid, an i at and outlet pipe for eachcompartment in circuit therewith, a valve in said circuit, a steam-jetheating pump for the liquid in said circuit, said pump consisting of acasing containlng a plurality of nozzles forming intercommunieatingmixing chambers, and a regulable steam-inlet valve in the end-nozzle, asteamsu ply pipe leading to said pump, and a circu ating umpcommunicatmg at its suction" and disc arge sides, respectively, with theend-compartments.

10. In a pasteurizing apparatus, the combination with a series ofcompartments for the pasteurizing liquid formin a sinuous course for theliquid, a pair of pipes extending about said compartments, a heatingpump communicating with said pipes, an outlet and inlet pipe for eachcompartment in circuit therewith, valve devices for each compartment insaid circuit and connecting said circuit to said pair of pipes, andmeans communicating with the end compartments to cause a circulationthrough all said compartments.

11. In a pasteurizing apparatus, the combination of a series ofcompartments for the pasteurizing liquid, forming a sinuous course forthe liquid, a pair of pipes extending about said compartments, a heatingum communicating with said pipes, va ve evices, one for eachcompartment, each consisting of .a casing containing a by-pass chamberprovided with ports and divided into an upper section and a lowersection, and a rotary plugvalve in the casing provided with ports andformed with an upper section and a lower section communicating,respectively, with a compartment at the upper and lower portionsthereof, the casing extending through both said pipes, and a circulatingump communicating at its suction and discharge sides, respectively, withthe end-compartments, for the purpose set forth.

12. In a pasteurizing apparatus, the combination of a series ofcompartments for the pasteurizing liquid, forming a sinuous course orthe liquid, a pair of pipes extending about said compartments, a heatingpump communicating with said pipes, valve devices, one for eachcompartment, each consisting of a casing provided with outer and innerwalls forming a by-pass chamber and having ports, with a partitiondividing said chamber into an upper section and a lower section, and arotary plug-valve in said casing provided with ports and formed with anupper section and a lower section'communicating, respectively, with acompartment at the upper and lower portions thereof, the casingextending through both said pipes, and a circulating pump communicating.at its suction and discharge sides, respectively, with theend-compartments, for the purpose set forth.

13. In a pasteuring apparatus, the combination of a series ofcompartments for the asteurizing liquid, forming a sinuous course or theliquid, a pair of pipes extending about said compartments, a heatingpump communicating with said pipes, valve-devices, one for eachcompartment, each consisting of a cas-' ing interposed in both saidpipes and containing a by-pass chamber extending part way about thecasing with a partition dividing said chamber into an upper section anda lower section with ports forming passages through the chamber, and arotary plugvalve in said casing provided with ports and containing apartition forming an upper section and a lower section communicating,respectively, with a compartment at the upper and lower portionsthereof, and a circulatlng pump communicating at its suction anddischarge sides, respectively, with the end-compartments, for thepurpose set forth.

.14. In a pasteurizing apparatus, the combination with a series ofcompartments for the asteurizing li uid, of means for causing the 'quidto circu ate successively through said series, an outlet and inlet ipefor each compartment in circuit therewit and means connected to saidoutlet and inlet pipe for causing a circulation therethrough and forchanging the temperature of the liquid. 7

JOHN T. H. PAUL. In presence of A. W. THoRrEN, R. A. SCHAEFER.

